Metallic-filament lamp.



H. J. .IAEGER.

METALLIC FILAMENT LAMP.

APPLICATION FILED DEC. 15. l9l6.

1,Q86,596. I I Patented Dec. 3, 1918.

' tallic-Filament Lamps, of which the follow- HERMAN J. JAEGER,

OF WEEHAWKEN, NEW JERSEY, ASSIGNOR T0 H. J. JAEGER COM- PANY, OF WEEHAWKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

METALLIC-FILAMENT LAMP.

To all whom it may concern:

Beit known that I, HERMAN J. JAEGER, a citizen of the United States of America, and a resident of Weehawken, county of Hudson, State of New Jersey, have invented certain new and useful Improvements in Meing is a specification.

This invention has reference to improvements in metallic filament lamps. It pertains particularly to lamps provided with concentrated metallic filaments as the incandescing and light emitting body.

The present invention has for its special purpose to dispense with the well known glass rod or support fused to the stem, extending upwardly chors which support the incandescing concentrated filament. The glass rod or support extending 'up to the filament becomes hot when the filament is rendered incandescent and it conducts away and transmits the heat of the filament to other parts of the lamp whereby blackening of the inner surface of the globe is impending. Further a glass rod or support with filament supporting anchors rigidly connects the filament and leads. That is the entire inner structure which causes breakage during the manufacture and transportation of the lamps.

The present invention dispenses with the glass rod or support and thereby greatly re duces the liability to blackening of the lamp which is a desirable advantage during use and breakage of the filament is prevented when the lamp is shaken during nianufacture, packing and transportation whereby the cost of production of the whole output'is decreased. These desirable results have been attained by the novel construction of the lamp. If the glass rod is dispensed with there is no rigid bridge for transmitting or conducting awa'y heat from the incandescent filament which then is allowed to swing freely when shaken during manufacture and transportation.

In order to renderthe invention entirely clear reference is had to the accompanying drawing in which:

Figure 1 represents, somewhat in perspec tive view, an incandescent lamp with concentrated metallic filament embodying in desirable form the present improvements.

somewhat in perspective Fig. 2 illustrates,

modified form view, on an enlarged scale a of the device.

I Specification of Letters Patent.

lamp globe,

and "provided with an- Patented Dec. 3, 191 s.

1 Application filed December 15, 1916. Serial No. 137,071.

of high candle power of usually 110 volts.

Larger lamps simply require stronger filamentsupports.

In Fig. l of the drawing a; represents the b is the neck of the globe and c The leads d, 6 pass through thesolid top portion 0 of the stem wherein the small platinum wires are 'fused in the usual manner. The continuations of the leads above the solid glass portion 0 of the stem 0 extend upwardly and are of relatively great length. These long sections f, 9 form the supports for the concentrated filament. They are relatively strong and heavy and close together, that is, parallel to each other.

the inner stem.

In the form of lamp illustrated in Fig. l

the concentrated filament It has the shape of an open polygon. Its free ends are secured each in a small short tube 2', j preferably made of tungsten or nickel and pressed flat.

-A straight metal wire, preferably a copper with their inner ends into a glass button .0.

A plurality of anchors p, g, 7", s, t are fused with their inner ends into theglass button at approximately equal distances from each other and extend radially in an outward direction. The outer end of each anchor is formed iilto a small hook t which supports the concentrated filament in one of its angles as shown. In order to bring the filament thus supported into the center of the globe the supports, f, g, are slightly bent toward the glass wall. Thus the concentrated filament is supported with its free ends merely on the metallic filament supports f, g leating the entire open polygon filament to swing freely when shaken during manufacture or transportation. The small central glass button 0 into which the inner ends of the anchors are fused'is light. It is suspended in the open space and the anchors perfectly support the filament in the described manner without the use of any rigid glass rod or support. The anchors are insulated from each other by the glass button hence the current simply flows through the concentrated filament.

A modified form of filament support is shown in Fig. 2. The filament supports 7, g extend upward from the solid portion 0 of the stem in a straight vertical plane and diverge from each other. The glass button 0 supports the radial anchors as described with reference to Fig. 1. The anchors u, o are clamped between the flattened bent over ends 72 Z of the supports 7, g and extend beyond the same into a small tube a, j in which the free ends of two filaments it, h are also clamped. As stated there are two filaments in this modified form of equal voltage, say of llQvoltseach. The two filaments thus form a closed polygon, as shown and the radial anchors w, w, y, etc., support the filaments with their end hooks t in the angles as described. Thus the short sections of the A anchors u, '2: from the supports f 9 to the small metal tube in which the filament ends are secured are conducting the current while the long inner portions of these anchors, al-

though of metal, do not conduct current be .cause their inner ends are fused into the glass button 0 and insulated thereby. The filaments in this construction swing freely when the lamp is shaken because the glass button 0 is suspended in the open space and no glass rod is employed. In fact the filaments are suspended on their ends and on the ends of two anchors and carried by the filament supports. 1

A. somewhat modified form of the arrangement shown in Fig. 2 is illustrated in Fig. 3. This modified form is exactly constructed like the one shown in Fig. 2 except to note that the anchors u), v extend each beyond a small compressed tube 2' 7' Beyond'the tube each anchor is bent downwardly at approximately a right angle and 1 its free downward end is secured to the end of a filament support f 9 as shown at z, z. The filaments in this construction swing freely to a rather marked degree as compared with the modified form shown in Fig. 2, because the point of connection between an anchor and a supportis located outside of the closed polygon.

I claim as my invention:

1. A metallic filament lamp comprising a globe, a stem with leads, continuations of the leads extending up into the globe, a glass button with metallic radial anchors, of which two. anchors are supported by the continuations of the leads, and a metallic filament supported on the anchors, and thus suspended from the continuations of the leads.

2. A metallic filament lamp comprising abeing thus suspended from the continuations of the leads.

3. A metallic filament lamp comprising a globe, a stem with leads, continuations of the leads extending up into the globe, a glass button with metallic radial anchors of which two anchors are supported by the inner ends of the continuations of the leads, two small conductive tubes at the outer ends of the two supported anchors, and a metallic filament of nearly circular shape supported on the anchors and with its ends in the small conductive tubes, being thus suspended from the continuations of the leads.

4. A metallic filament lamp comprising a globe, a stem with leads, continuations of the leads extending up into the middle portion of the globe, a. glass button with metallic radial anchors, of which two anchors are supported by the inner ends of the continuations of the leads, two small conductive tubes at the outer ends of the two supported anchors, and a metallic filament of polygon shape supported on the anchors, and with its ends in the small conductive tubes, being thus suspended from the continuations of the leads.

5. .A metallic filament lamp comprising essentially leads, a concentrated metallic incandescing body of polygon shape, a suspended glass button with metallic anchors supporting the filament, and supports forming the continuations of the leads and carrying at their inner ends two' of the anchors, whereby the filament is suspended.

6. A metallic filament lamp comprising essentially leads, continuations of the leads of rather great length, two anchored con- .centrated metallic incandescing bodies form- Signed at New York, N. Y., this 9th day of December, 1916.

HERMAN J. Janene.

Witnesses:

HERMAN J. RUBENSTEIN. LILLEY E; SCHMIDT. 

